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DM74LS257BM中文資料仙童半導體數(shù)據(jù)手冊PDF規(guī)格書
DM74LS257BM規(guī)格書詳情
General Description
These Schottky-clamped high-performance multiplexers feature 3-STATE outputs that can interface directly with data lines of bus-organized systems. With all but one of the common outputs disabled (at a high impedance state), the low impedance of the single enabled output will drive the bus line to a HIGH or LOW logic level. To minimize the possibility that two outputs will attempt to take a common bus to opposite logic levels, the output enable circuitry is designed such that the output disable times are shorter than the output enable times.
Features
■ 3-STATE versions LS157 and LS158 with same pinouts
■ Schottky-clamped for significant improvement in A-C performance
■ Provides bus interface from multiple sources in high-performance systems
■ Average propagation delay from data input 12 ns
■ Typical power dissipation: 50 mW
產品屬性
- 型號：
DM74LS257BM
- 功能描述：
編碼器、解碼器、復用器和解復用器 3-STATE Data Sel/Mul
- RoHS：
否
- 制造商：
Micrel
- 產品：
Multiplexers
- 邏輯系列：
CMOS
- 線路數(shù)量（輸入/輸出）：
2/12
- 傳播延遲時間：
350 ps, 400 ps
- 電源電壓-最大：
2.625 V, 3.6 V
- 電源電壓-最小：
2.375 V, 3 V
- 最大工作溫度：
+ 85 C
- 安裝風格：
SMD/SMT
- 封裝/箱體：
QFN-44
- 封裝：
Tray
| 供應商 | 型號 | 品牌 | 批號 | 封裝 | 庫存 | 備注 | 價格 |
|---|---|---|---|---|---|---|---|
FSC |
23+ |
SOP-16 |
3800 |
全新原裝正品現(xiàn)貨,支持訂貨 |
詢價 | ||
FAIRCHILD/仙童 |
22+ |
DIP16 |
9600 |
原裝現(xiàn)貨,優(yōu)勢供應,支持實單! |
詢價 | ||
NS/國半 |
95+ |
NA |
880000 |
明嘉萊只做原裝正品現(xiàn)貨 |
詢價 | ||
TI/德州儀器 |
23+ |
SOIC-16 |
50000 |
全新原裝正品現(xiàn)貨,支持訂貨 |
詢價 | ||
FAIRCHILD |
24+ |
DIP |
98 |
詢價 | |||
NS |
22+ |
DIP |
10000 |
原裝正品優(yōu)勢現(xiàn)貨供應 |
詢價 | ||
ON Semiconductor |
24+ |
16-DIP |
56300 |
一級代理/放心采購 |
詢價 | ||
NS |
2023+ |
97 |
8700 |
原裝現(xiàn)貨 |
詢價 | ||
NSC |
NA |
8560 |
一級代理 原裝正品假一罰十價格優(yōu)勢長期供貨 |
詢價 | |||
FAIRCHILD |
24+ |
DIP |
5000 |
仙童授權代理原裝進口現(xiàn)貨 |
詢價 |
